Timedependant tooltip

This PR assures that if the timeslider is active and/or timeEnabled layers are added to the map, only the desired tooltips are shown. Specifically, it contains the following changes:

- Make an identify request per layer. This is needed because if timeslider is active and in 'most recent' mode, each time enabled layer could have different timeInstant parameter in the identify request
- Only query tooltips for specific time (which corresponds to objects that are really visible on the map)
- Overall behavior of component does not change
- Fixes a bug in timeslider component by taking into account highlight layers (before, highlight layers disabled the timeslider component)

Note: there is a couple of lines of duplicated code from timeslider in tooltip now. This is not ideal, but could be addressed in separate PR.

This depends on https://github.com/geoadmin/mf-chsdi3/pull/212 being merged and deployed. So when testing, make sure you use the correct branch for chsdi3.

Not to be merged during today's Deploy.